Usage Tips:Package include: you will get 6 packs index cards with ring and kraft covers, each pack contains 100 flashcards, 600 sheet index cards in total, including 6 colors(blue, green, pink, purple, yellow, orange), which can meet your daily needs. Portable size: these colorful flash cards are 3 x 4 inch/7.4 x 10.5 cm in A7 size, which are small and portable; You can put them in your coat pocket, jeans pocket, purse and handbag. Binder ring design: the colored flashcards with ring design. This index cards come with 6 pieces of stainless steel binder rings, which are easy to install and keep them together, convenient to hang or take down the cards. Reliable quality: each colored ruled index cards are made of thick paper and wrinkle-resistant, smooth and suitable for writing. Each piece of paper is ruled for easy and organized note taking. Wide application: our colored flash cards are perfect for taking notes, to do list, creating flash cards, game cards and recipe cards. Flip the cover as a backing when you are writing, quick and efficient. Colour:As Shown Material:Paper Package Contents: 600 x Underline Study Cards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.